Board: Waveshare ESP32-S3-Touch-LCD-7 - #15
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…g.lcd7) The 4.3" board's sdkconfig.board and partition table (same chip, memory and flash layout; boards flashed as the 4.3 keep their filesystem), then this board's fragment, appended last so it wins: - SPIRAM_MALLOC_ALWAYSINTERNAL 8192 -> 512, fewer Wi-Fi RX buffers, a 16 KB TCP window: internal DMA RAM, which the RGB panel's bounce buffers, the Wi-Fi driver, hardware AES and the USB host all need, sat at 24 bytes free with the shared settings, then esp-aes failed and Wi-Fi dropped. - FREERTOS_HZ 100 -> 1000: sleep_ms() under a tick busy-waits with the GIL held, keeping the UI thread 54 % busy while idle. Measured 2026-09-25 with spotapi's remote on the panel and earful streaming into a USB sound card (earful docs/lcd-7.md). Built from this directory the sdkconfig is identical to the image those measurements ran on. The board's board_config.py side is PyDevices/pydevices#96 (bounce_rows=10, 14 MHz).
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#17) Follow-up to #15. Measured with a Spotify remote UI on the panel, no playback: full-screen redraw 176 → 146 ms with 64-byte data cache lines alone (no memory cost), then 117 ms with a 32 KB instruction cache as well. A list row went 66 → 44 ms, and a panel switch 176 → 146 ms. The instruction cache costs 16 KB of internal RAM: DMA-capable free goes from 64 to 48 KB (minimum 45 KB), measured via the speaker app's debug endpoint. A 64 KB data cache got rows to 30 ms but left ~13 KB, too little for Wi-Fi to be safe, so it isn't included.
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A board directory for the ESP32-S3-Touch-LCD-7: the 4.3" board's
sdkconfig.boardand partition table, plussdkconfig.lcd7, which keeps internal DMA RAM free (SPIRAM_MALLOC_ALWAYSINTERNAL=512, fewer Wi-Fi RX buffers, a 16 KB TCP window) and setsFREERTOS_HZ=1000, becausesleep_ms()under one tick busy-waits holding the GIL. Each setting's reason is in the fragment.Measured on the board with a Spotify remote UI on the panel and a Spotify Connect speaker usermod playing into a USB sound card. The resulting sdkconfig is identical to the image those runs used. Companion PRs: PyDevices/pydevices#96 (board_config) and PyDevices/displayif#42 (
bounce_rows).